* This method is used to clean up failed connections.
     *
     * @param client The FTP client to disconnect
     */
    protected void disconnectInternalClient(final FTPClient client) {
        try {
            client.disconnect();
        } catch (final IOException e) {
            logger.warn("Failed to disconnect FTP client: connected={}", client.isConnected(), e);
        }
    }

    /**

                exceptionListener.accept(new CurlException("Failed to access to " + finalUrl, e));
            } finally {
                if (connection != null) {
                    connection.disconnect();
                }
            }
        };
        if (threadPool != null) {
            threadPool.execute(task);
        } else {
            task.run();
        }
    }

    /**